untreated
adjective
un·treat·ed
ˌən-ˈtrē-təd 
: not treated
untreated wastewater
especially
: not improved or controlled medically
an untreated case of pneumonia
untreated diabetic patients
Examples of untreated in a Sentence
untreated wool
Recent Examples on the Web
Like biological cancers, these flaws often spread silently, compromise system integrity and, if left untreated, can cause irreparable harm.
—
Sagar Gupta, Forbes.com, 2 Sep. 2025
According to Cristosal, many of those that died under custody since the crackdown began lost their lives due to untreated illnesses, such as kidney failure caused by dehydration, or internal injuries from beatings.
—Antonio María Delgado, Miami Herald, 2 Sep. 2025
Individuals under 70 years old who did not have hearing loss had a 29% lower risk for dementia in comparison to those with untreated hearing loss, according to the study authors.
—Amy McGorry, FOXNews.com, 1 Sep. 2025
When untreated, the virus progresses into liver cancer 25% of the time, killing one of four.
—Jia H. Jung, Mercury News, 1 Sep. 2025
See All Example Sentences for untreated
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Sagar Gupta, Forbes.com, 2 Sep. 2025
According to Cristosal, many of those that died under custody since the crackdown began lost their lives due to untreated illnesses, such as kidney failure caused by dehydration, or internal injuries from beatings.
—Antonio María Delgado, Miami Herald, 2 Sep. 2025
Individuals under 70 years old who did not have hearing loss had a 29% lower risk for dementia in comparison to those with untreated hearing loss, according to the study authors.
—Amy McGorry, FOXNews.com, 1 Sep. 2025
When untreated, the virus progresses into liver cancer 25% of the time, killing one of four.
—Jia H. Jung, Mercury News, 1 Sep. 2025
See All Example Sentences for untreated
Cite this Entry
“Untreated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/untreated. Accessed 10 Sep. 2025.
Copy CitationMedical Definition
untreated
adjective
un·treat·ed
-ˈtrēt-əd
: not subjected to treatment
an untreated disease
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